The Stavanger Symphony Orchestra (Norwegian: Stavanger Symfoniorkester, SSO) is a symphony orchestra based in Stavanger, Norway. The SSO principal venue is the Stavanger Concert Hall (Stavanger konserthus), performing in the Fartein Valen concert hall. The Norwegian Broadcasting Corporation founded the orchestra in 1938 as the Stavanger musikerforenings orkester, for radio broadcasts. The orchestra's first artistic leader was the violinist Gunnar Knudsen, from 1938 to 1945. In 1965, the orchestra's name was changed to the Symfoniorkestret i Stavanger, and again in 1982 to its present name.